Replace the 20 year old water heater. It's past its life span. They now make more energy effecient water heaters which will lower your utility bill. Put a blanket around the new water heater while you're at it.
A light period is a menstrual cycle that is shorter and/or lighter than a woman's regular period. Women should familiarize themselves with their menstrual cycle, how many pads or tampons they use, and how long their periods last to quickly detect any changes in their periods.
You have a decline in estrogen. One out of ten women experience light spotting during ovulation in their menstrual cycle because of a brief decline in their estrogen levels that happens when an egg is released from an ovary. This type of spotting usually occurs about ten to fourteen days before your next period.